(libc.info.gz) File Status Flags

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(libc.info.gz) Descriptor Flags

(libc.info.gz) Low-Level I/O

(libc.info.gz) File Locks

 
 13.14 File Status Flags
 =======================
 
 "File status flags" are used to specify attributes of the opening of a
 file.  Unlike the file descriptor flags discussed in  Descriptor
 Flags, the file status flags are shared by duplicated file descriptors
 resulting from a single opening of the file.  The file status flags are
 specified with the FLAGS argument to `open';  Opening and Closing
 Files.
 
    File status flags fall into three categories, which are described in
 the following sections.
 
    *  Access Modes, specify what type of access is allowed to the
      file: reading, writing, or both.  They are set by `open' and are
      returned by `fcntl', but cannot be changed.
 
    *  Open-time Flags, control details of what `open' will do.
      These flags are not preserved after the `open' call.
 
    *  Operating Modes, affect how operations such as `read' and
      `write' are done.  They are set by `open', and can be fetched or
      changed with `fcntl'.
 
    The symbols in this section are defined in the header file `fcntl.h'.  
 

Menu

 
* Access Modes                Whether the descriptor can read or write.
* Open-time Flags             Details of `open'.
* Operating Modes             Special modes to control I/O operations.
* Getting File Status Flags   Fetching and changing these flags.
 

Info Catalog

(libc.info.gz) Descriptor Flags

(libc.info.gz) Low-Level I/O

(libc.info.gz) File Locks